Drobo DR04D-D 4 Bay Redundant Storage Array *NO PSU/DRIVES* *TESTED* 90DAYRTB

Built on BeyondRAID technology with single drive redundancy, the Drobo protects your data automatically, even in the event of multiple drive failures. Able to hold up to four hot-swappable drives, this system ensures you'll have a high-performance connection to virtually any system with available USB 2.0 and FireWire 800 connectivity.

eBay